Fusion Dance: For successful fusion, two characters of about the same race, species, height, weight and power level do a complicated dance. If there are no errors, they "fuse" -- or merge -- and become a singular being of extravagant power. Should the dance not be performed correctly, the being will be extremely weak. This type of fusion wears off in 30 minutes.

Potara Fusion: It has the same results as the Fusion Dance, the characters must simply wear the Potara Earings and look at each other to fuse. However, there's one "slight" downfall: the users stay fused forever. In the Buu saga Goku and Vegeta are able to defuse back to their original selves after entering Kid Buu because the laws of physics differ within Buu.

Namek-jin Fusion: Used by only the Namek-Jin, this fusion is basically the absorbtion of another Namek. The lead of the fusion places their hands on the other Namek's chest, and "absorbs" them, gaining both their knowledge and their power. This fusion is permanent and the characters cannot defuse. This is why Kami-sama took the time he did he before deciding to fuse with Piccolo.


----Successful Fusions

Chibi Trunks + Goten = Gotenks(Fusion Dance)
Gokou + Vegeta = Gogeta(Fusion Dance)
Gokou + Vegeta = Vegetto(Potara Fusion)
Nail + Piccolo = Piccolo(Namek Fusion)
Kami + Piccolo = Piccolo(Namek Fusion)

----Unsuccessful Fusions

Chibi Trunks + Goten = Fat Gotenks(Fusion Dance)
Chibi Trunks + Goten = Old Man Gotenks(Fusion Dance)
Gokou + Vegeta = Fat Gogeta(Fusion Dance)
Gokou + Vegeta = Old Man Gogeta(Fusion Dance)
Kuririn + Piccolo = Piririn(Fusion Dance)